This commit restructures many of the ES6 modules, splitting them
up to actual export multiple functions instead of a single object.
It also splits up Util into multiple sub-modules, to make it easier
to maintain.
Finally, localisation is renamed to localization.
The only remaining user of WebUtil.load_scripts was for loading
localisation. Instead, we now load the localization information
over XHR as a JSON blob.
The browsers' support for Microsoft's cursor format is a bit spotty,
so use the more common PNG format instead. This also allows us to
use a Canvas to generate the image, rather than coding it by hand.
This removes the special comment part of the ES6 module syntax,
opting to enable ES6 module syntax by default.
It also appends `.js` to all import paths to better support in-browser
loading.
`app/ui.js` had an incorrect import path which caused issues
when using the ES6 and/or CommonJS builds of noVNC.
`core/util.js` had a non-strict-compatible declaration of a variable
without a `let` or `var` (it now uses `let`).
This fixes both issues.
It mostly dealt with scrolling which we don't use. It also made mistakes
in some cases. Remove it and compute the coordinates directly in the
calling code.
The native WebSocket is in a much better position to do queue
management than us. We also failed to check the return value and
set up a timer, causing stalls.
This gets us in sync with websockify as of 40238b00.
We don't have to check for _display or context here since this is a
private function which is never called under such circumstances. This
solves problems caused by display.get_context() which was previously
removed in e549ae074fcea9febde32c0fa260a64c15cc1b8e.
The old default was to ask for the maximum compression level. This
is against the recommendations in libvncserver/tight.c due to excessive
CPU load. It also causes Vino 3.8.1 (still shipped with Ubuntu 16.04
LTS) to prefer the blurry JPEG compression too much - e.g. red text on
the default background in MATE terminal becomes almost unreadable.
The new default is the recommended compression level for low-color
workloads, according to libvncserver source. Also, it is the maximum
compression level that doesn't trigger the Vino bug with red text in
most cases.
Fixes issue #737.
Do all rendering to a hidden canvas and then copy over the finished
frame to the visible canvas once everything is done. This simplifies
things and solves some bugs as we can retain a copy of the entire
frame buffer.
Supports server configurations that might prefer wss:// connections
on the default port, then proxies them through the web server to the
VNC server.
This proxy configuration is helpful on servers using self-signed
certificates. Accessing the https://host/vnc_auto.html page and
adding an exception for that host is sufficient to also satisfy the
wss://host/ request, unlike requests to wss://host:port/ which
may require an extra certificate exception.
